AP5726WUG-7 Equivalent & Substitute Parts

Part Overview

The AP5726WUG-7 is an LED Driver IC manufactured by Diodes Incorporated, classified as a Power Management PMIC. This single-output DC-DC regulator employs Step-Up (Boost) topology with PWM dimming capability, delivering 750mA switch current at 1.2MHz operating frequency. The device operates across a 2.7V to 5.5V supply range and is designed for backlight applications in consumer electronics.

The AP5726WUG-7 maintains Active product status with ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1). With 6355 units in current inventory, this component is readily available. Equivalent and substitute parts are identified to provide design flexibility, accommodate supply chain variations, or address specific application requirements such as different package formats, output current ratings, or dimming control methods.

Key Parameters

Parameter	Value
Manufacturer Part Number	AP5726WUG-7
Manufacturer	Diodes Incorporated
Product Category	Power Management (PMIC)
Type	DC DC Regulator
Topology	Step-Up (Boost)
Package / Case	SOT-23-6 Thin, TSOT-23-6
Voltage - Supply (Min)	2.7V
Voltage - Supply (Max)	5.5V
Current - Output / Channel	750mA (Switch)
Frequency	1.2MHz
Dimming Control	PWM
Operating Temperature	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)
Product Status	Active

Substitute Part Grouping Explanation

Substitution eligibility for the AP5726WUG-7 is determined by the following critical parameters:

Primary Substitution Criteria:

Topology: Step-Up (Boost) configuration
Supply voltage range: 2.7V to 5.5V minimum compatibility
Dimming method: PWM control capability
Output current: Minimum 750mA switch current or equivalent
Package compatibility: Surface mount, pin-compatible or functionally equivalent
Compliance: ROHS3 and REACH unaffected status
Product status: Active

Grouping Logic:

Substitute parts are categorized into three groups based on parameter alignment:

Group 1 - Direct Parametric Equivalents (Same Topology, Supply Range, Dimming): Parts maintaining identical or superior electrical specifications within the same package family or compatible alternatives. These include AP5724WUG-7 (same manufacturer, identical electrical parameters, different packaging), and parts with matching Step-Up topology, 2.7V-5.5V supply range, and PWM dimming.

Group 2 - Functional Equivalents (Compatible Topology, Extended Capabilities): Parts offering Step-Up topology with 2.7V-5.5V supply compatibility but with enhanced features such as I2C dimming control (ADP1655ACBZ-R7), higher current ratings (MIC2297-38YML-TR at 1.2A), or dual topology support (LT3517EFE#PBF with Buck-Boost capability).

Group 3 - Application-Specific Alternatives (Different Topology or Supply Range): Parts designed for similar LED driver applications but with different topologies (Step-Down/Buck) or extended supply ranges. These include LM3406MHX/NOPB (Buck topology, 6V-42V supply, automotive grade) and are suitable only when application requirements permit topology variation.

Parameter Comparison

Part Number	Manufacturer	Topology	Supply Min	Supply Max	Output Current	Frequency	Dimming	Package	Temp Range	Status
AP5726WUG-7	Diodes Inc.	Step-Up (Boost)	2.7V	5.5V	750mA (Switch)	1.2MHz	PWM	TSOT-23-6	-40°C ~ 85°C	Active
AP5724WUG-7	Diodes Inc.	Step-Up (Boost)	2.7V	5.5V	750mA (Switch)	1.2MHz	PWM	TSOT-23-6	-40°C ~ 85°C	Active
MP3205DJ-LF-P	Monolithic Power Systems	Step-Up (Boost)	2.5V	6V	350mA (Switch)	1.3MHz	Analog, PWM	TSOT-23-5	-40°C ~ 85°C	Active
NCV3065DR2G	onsemi	Step-Down (Buck), Step-Up (Boost)	3V	40V	1.5A (Switch)	150kHz	Analog, PWM	8-SOIC	-40°C ~ 125°C	Active
LT3517EFE#PBF	Analog Devices Inc.	Step-Down (Buck), Step-Up (Boost)	3V	30V	1.5A (Switch)	250kHz ~ 2.5MHz	Analog, PWM	16-TSSOP-EP	-40°C ~ 125°C	Active
ADP1655ACBZ-R7	Analog Devices Inc.	Step-Up (Boost)	2.7V	5.5V	500mA (Flash)	2MHz	I2C	12-WLCSP (1.5x2)	-40°C ~ 85°C	Active
MCP1664T-E/MNY	Microchip Technology	Step-Up (Boost)	2.4V	5.5V	300mA	500kHz	PWM	8-TDFN (2x3)	-40°C ~ 125°C	Active
MIC2297-38YML-TR	Microchip Technology	Step-Up (Boost)	2.5V	10V	1.2A (Switch)	600kHz	PWM	10-MLF® (3x3)	-40°C ~ 125°C	Active
MIC2873YCS-TR	Microchip Technology	Step-Up (Boost)	2.7V	5.5V	1.2A (Flash)	2MHz	Single-Wire	9-WLCSP (1.3x1.3)	-40°C ~ 85°C	Active
LM3530UMX-40B/NOPB	Texas Instruments	Step-Up (Boost)	2.7V	5.5V	30mA	500kHz	PWM	12-DSBGA	-40°C ~ 85°C	Active
LM3406MHX/NOPB	Texas Instruments	Step-Down (Buck)	6V	42V	1.5A	10kHz ~ 1MHz	PWM	14-HTSSOP	-40°C ~ 125°C	Active

Engineering Selection Recommendations

Direct Replacement (Group 1):

AP5724WUG-7 serves as the primary direct equivalent to AP5726WUG-7. Both parts are manufactured by Diodes Incorporated with identical electrical specifications: Step-Up topology, 2.7V-5.5V supply range, 750mA switch current, 1.2MHz frequency, and PWM dimming. The sole difference is packaging format (Cut Tape & Digi-Reel versus Tape & Reel). Both maintain Active product status, ROHS3 compliance, and MSL 1 rating. Selection between these two depends exclusively on packaging and supply chain requirements.

Functional Equivalents with Enhanced Features (Group 2):

MP3205DJ-LF-P (Monolithic Power Systems) provides Step-Up topology with 2.5V-5.5V supply compatibility and PWM dimming. Output current is reduced to 350mA, making this suitable only for lower-power backlight applications. Package is TSOT-23-5 (5-pin versus 6-pin), requiring PCB layout modification.

MIC2297-38YML-TR (Microchip Technology) offers superior 1.2A switch current with PWM dimming and Step-Up topology. Supply range extends to 10V maximum. Operating temperature extends to 125°C. Package is 10-MLF (3x3), requiring different PCB footprint. This part is suitable when higher output current or extended temperature operation is required.

MIC2873YCS-TR (Microchip Technology) maintains 2.7V-5.5V supply compatibility with 1.2A flash current and 2MHz frequency. Dimming control uses Single-Wire protocol instead of PWM, requiring different firmware implementation. Package is 9-WLCSP (1.3x1.3), suitable for compact designs. MSL rating is 3 (168 hours), requiring moisture control during assembly.

ADP1655ACBZ-R7 (Analog Devices Inc.) maintains 2.7V-5.5V supply range with Step-Up topology and 2MHz frequency. Dimming control is I2C-based, enabling digital brightness adjustment. Output current is 500mA (flash mode), lower than the main part. Package is 12-WLCSP (1.5x2), suitable for space-constrained applications. This part is recommended when I2C dimming control integration is required.

LT3517EFE#PBF (Analog Devices Inc.) provides dual topology (Buck-Boost) with extended 3V-30V supply range and 1.5A switch current. Frequency range is 250kHz-2.5MHz with both Analog and PWM dimming. Operating temperature extends to 125°C. Package is 16-TSSOP-EP, larger than the main part. This part is suitable for applications requiring flexible input voltage handling or extended temperature operation.

Application-Specific Alternatives (Group 3):

LM3406MHX/NOPB (Texas Instruments) employs Step-Down (Buck) topology with 6V-42V supply range, fundamentally different from the main part's Step-Up configuration. This part is suitable only for applications where input voltage exceeds desired output voltage. Automotive grade qualification and 125°C operating temperature are available. Selection requires application topology verification.

LM3530UMX-40B/NOPB (Texas Instruments) maintains Step-Up topology and 2.7V-5.5V supply compatibility with PWM dimming. Output current is significantly reduced to 30mA, suitable only for low-power indicator LED applications. Package is 12-DSBGA. This part is not recommended as a general substitute due to current limitation.

MCP1664T-E/MNY (Microchip Technology) provides Step-Up topology with 2.4V-5.5V supply range and PWM dimming. Output current is 300mA, lower than the main part. Operating temperature extends to 125°C. Package is 8-TDFN (2x3). This part is suitable for lower-current backlight applications with extended temperature requirements.

NCV3065DR2G (onsemi) offers dual topology (Buck-Boost) with extended 3V-40V supply range and 1.5A switch current. Frequency is fixed at 150kHz. Both Analog and PWM dimming are supported. Operating temperature extends to 125°C. Package is 8-SOIC. This part is suitable for lighting applications requiring flexible topology and extended supply range.

Compliance and Certification:

All recommended substitute parts maintain Active product status, ROHS3 compliance, and REACH unaffected status, matching the main part's regulatory requirements. MSL ratings vary (primarily MSL 1, with MIC2873YCS-TR at MSL 3). Extended operating temperature variants (to 125°C) are available in LT3517EFE#PBF, LM3406MHX/NOPB, MCP1664T-E/MNY, MIC2297-38YML-TR, and NCV3065DR2G for applications requiring enhanced thermal performance.

Frequently Asked Questions (FAQ)

Q: Can AP5724WUG-7 be used as a direct replacement for AP5726WUG-7?

A: Yes. AP5724WUG-7 is a direct parametric equivalent with identical electrical specifications: Step-Up topology, 2.7V-5.5V supply range, 750mA switch current, 1.2MHz frequency, and PWM dimming. The only difference is packaging format (Cut Tape & Digi-Reel versus Tape & Reel). Both parts are manufactured by Diodes Incorporated and maintain identical compliance certifications. Selection depends on packaging and supply chain availability.

Q: What is the key difference between PWM and I2C dimming control?

A: PWM (Pulse Width Modulation) dimming adjusts brightness by varying the duty cycle of a digital signal applied to a dedicated pin. I2C dimming uses a serial communication protocol to send brightness commands over a two-wire interface. ADP1655ACBZ-R7 uses I2C control, requiring firmware implementation of I2C communication. PWM-based parts (AP5726WUG-7, AP5724WUG-7, MP3205DJ-LF-P) require only a PWM signal generator, typically simpler to implement.

Q: Can I use MIC2297-38YML-TR as a substitute if my application requires higher output current?

A: Yes, if your application can accommodate the package change. MIC2297-38YML-TR provides 1.2A switch current (versus 750mA in AP5726WUG-7), Step-Up topology, 2.5V-10V supply range, and PWM dimming. Operating temperature extends to 125°C. Package is 10-MLF (3x3), requiring PCB layout modification. Verify that your PCB design can accommodate the different footprint and that the extended supply range (up to 10V) is compatible with your input source.

Q: What does MSL rating mean, and why does MIC2873YCS-TR have MSL 3?

A: MSL (Moisture Sensitivity Level) indicates how sensitive a component is to moisture absorption during storage and assembly. MSL 1 (unlimited) means the part can be stored indefinitely without moisture control. MSL 3 (168 hours) means the part must be used within 168 hours of opening the moisture barrier bag, or it must be baked to remove absorbed moisture before soldering. MIC2873YCS-TR has MSL 3 due to its 9-WLCSP package design. If your manufacturing process cannot accommodate MSL 3 requirements, select MSL 1 alternatives.

Q: Why would I choose a Buck-Boost topology part like LT3517EFE#PBF or NCV3065DR2G?

A: Buck-Boost topology allows the regulator to step voltage either up or down, providing flexibility when input voltage may vary above or below the desired output voltage. LT3517EFE#PBF supports 3V-30V input with 1.5A output and extended 125°C temperature operation. NCV3065DR2G supports 3V-40V input with 1.5A output. These parts are suitable for applications with variable input sources or when a single IC must handle multiple voltage scenarios. However, they are more complex and typically larger than dedicated Step-Up parts.

Q: Is LM3406MHX/NOPB suitable as a substitute for AP5726WUG-7?

A: No, not as a direct substitute. LM3406MHX/NOPB uses Step-Down (Buck) topology, which requires input voltage to be higher than desired output voltage. AP5726WUG-7 uses Step-Up (Boost) topology, which steps voltage up from a lower input. These topologies are fundamentally different. LM3406MHX/NOPB is suitable only if your application can provide higher input voltage and requires step-down regulation. It offers advantages including 6V-42V supply range, 1.5A output, automotive grade qualification, and 125°C operation.

Q: What package considerations should I evaluate when selecting a substitute?

A: Package type determines PCB footprint, assembly process compatibility, and thermal performance. AP5726WUG-7 uses TSOT-23-6 (6-pin, small outline). Substitutes vary: AP5724WUG-7 (identical TSOT-23-6), MP3205DJ-LF-P (TSOT-23-5, 5-pin), MCP1664T-E/MNY (8-TDFN 2x3), MIC2297-38YML-TR (10-MLF 3x3), MIC2873YCS-TR (9-WLCSP 1.3x1.3), ADP1655ACBZ-R7 (12-WLCSP 1.5x2), LT3517EFE#PBF (16-TSSOP-EP), NCV3065DR2G (8-SOIC), LM3530UMX-40B/NOPB (12-DSBGA), and LM3406MHX/NOPB (14-HTSSOP). Verify PCB layout compatibility, reflow profile requirements, and thermal management needs before selection.

Q: Can I use a lower-current part like MCP1664T-E/MNY (300mA) or LM3530UMX-40B/NOPB (30mA) as a substitute?

A: Only if your application's actual LED current requirement is lower than the main part's 750mA rating. MCP1664T-E/MNY at 300mA is suitable for moderate-power backlight applications. LM3530UMX-40B/NOPB at 30mA is suitable only for low-power indicator LEDs. Using an undersized part may result in thermal stress, reduced efficiency, or inability to drive the intended LED load. Verify your actual current requirement before selecting a lower-rated substitute.

Q: What is the frequency difference between parts, and does it matter?

A: Switching frequency affects efficiency, EMI characteristics, and component size. AP5726WUG-7 operates at 1.2MHz. Substitutes range from 150kHz (NCV3065DR2G) to 2.5MHz (LT3517EFE#PBF). Higher frequencies (2MHz in ADP1655ACBZ-R7, MIC2873YCS-TR) allow smaller inductors and capacitors but may increase EMI. Lower frequencies (150kHz in NCV3065DR2G) reduce EMI but require larger passive components. Frequency selection depends on PCB space constraints, EMI requirements, and power supply design. Verify that your inductor and capacitor selections are compatible with the substitute part's frequency.

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